I'm not so sure Bale is playing any 'better'. He is playing differently.
Bale got what, 10 and 10 assists last season. So far he has the edge on goals but few assists.
Bale may end up getting more than Ade last year, but he's been playing more as a striker than a provider.
Before we had known strikers getting goals and still some from midfield (Daffy and Ade got 28/12 goals/assists between them last season and so far have 12/3 this season - a major difference). Across the replacements for VdV-Modric (Dembele, Dempsey and Sig), so far we're getting enough goals/assists to compensate for their loss.
I'm still not sure though that Bale becoming the goalscorer rather than provider is the 'total' answer, but I think it has had a bearing on the goals scored by Ade/Daffy.
I still think we need the goals from Daffy coming back on form or Ade finding his. Bale's goals should be a bonus to us.